I'm familiar with that esc, the maximum the drag brake goes up to is 10%, nor nearly enough for crawling with.
If absolutely does cog too. Just because it's within an acceptable amount for you doesn't mean it's not there.
I've run plenty of brushless in crawlers. My u4 wraith run a tekin rok412 2300kv and castle mmp setup. I also know what it's like running sensorless when the sensor wire has come unplugged, and it's rubbish for crawling with.